Stockholders' Equity (Details) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 31, 2021 USD ($) vote $ / shares shares	Oct. 31, 2020 USD ($)	Oct. 31, 2021 USD ($) vote $ / shares shares	Oct. 31, 2020 USD ($)	Apr. 30, 2021 $ / shares shares	Nov. 30, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)	200,000,000		200,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001
Preferred stock, shares issued (in shares)	0		0
Preferred stock, shares outstanding (in shares)	0		0
Automatic conversion period, following the death or incapacity of Mr. Siebel			6 months
Automatic conversion period, following the date Mr. Siebel no longer providing services			6 months
Automatic conversion, anniversary period, if circumstances met			20 years
Net proceeds common stock exercised prior to vesting | $	$ 0.0	$ 1.5	$ 0.0	$ 1.5
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares subject to repurchase right (in shares)			621,056		1,091,306
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	1,000,000,000		1,000,000,000		1,000,000,000	390,000,000
Voting rights, number of votes for each share | vote	1		1
Common stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001		$ 0.001
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	3,500,000		3,500,000		3,500,000	21,000,000
Voting rights, number of votes for each share | vote	50		50
Common stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001		$ 0.001